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Study on the Surface Modification of Hydrophobic Polyacrylate Intraocular Lens 被引量:2
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作者 TANG Hui-qin WANG Gui-qin GU Han-qing 《Chinese Journal of Biomedical Engineering(English Edition)》 2013年第1期29-36,共8页
In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is graf... In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is grafted onto the hydrophobic polyacrylate intraocular lens surface in a certain reaction conditions. Specific changes in intraocular lens are detected by static contact angle (CA), scanning electron microscope (SEM) and light transmittance. The results show that this surface modification can greatly improve its hydrophilic character and surface formation. 展开更多
关键词 hydrophobic polyacrylate intraocular lens vinyl pyrrolidone argon ion irradiation graft surface modification
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Study on Titanium Nitride Film Modified for Intraocular Lens
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作者 ZHANG Bai-ming GU Han-qing 《Chinese Journal of Biomedical Engineering(English Edition)》 2009年第4期171-177,184,共8页
Objective:To study the characteristics of the intraocular lens using ion beam sputtering depositing titanium nitride thin film on the intraocular lens(IOLs).Methods:To deposite titanium nitride thin film on the top of... Objective:To study the characteristics of the intraocular lens using ion beam sputtering depositing titanium nitride thin film on the intraocular lens(IOLs).Methods:To deposite titanium nitride thin film on the top of intraocular lens by ion beam sputtering depositing.We analyzed the surface morphology of intraocular lens through SEM and AFM.We detected intraocular lens resolution through the measurement of intraocular lens.Biocompatibility of intraocular lens is preliminary evaluated in this test.Results:The surface morphology of intraocular lens material was not changed,and was in line with the requirements of smoothness.Resolution was in line with national requirements.Unmodified and modified IOLs's cytotoxicity were 1 and 0.6 grade respectively.Hemolytic rates of modified and unmodified were both less than 5%.Conclusion:Ion beam sputtering deposition of objects didn't only affect the surface morphology and the basic optical performance,but also can enhance the biocompatibility of intraocular lens.Ion beam sputtering deposition technique has provided new methods for the surface modification of IOLs and PMMA materials. 展开更多
关键词 titanium nitride intraocular lens surface modification RESOLUTION BIOCOMPATIBILITY
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改良SRK-T公式预测人工晶状体植入术后散光误差分析
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作者 涂云海 俞阿勇 +2 位作者 宥永胜 高潮 吴文灿 《中华眼视光学与视觉科学杂志》 CAS 2011年第2期144-147,共4页
目的 评价改良SRK-T公式对球面人工晶状体植入术后预测散光的可行性及其误差的影响因素,以探讨改良SRK-T公式在散光人工晶状体度数计算中的应用价值.方法 回顾性系列病例研究.分析2007年10月至2008年6月行超声乳化白内障摘除联合球面人... 目的 评价改良SRK-T公式对球面人工晶状体植入术后预测散光的可行性及其误差的影响因素,以探讨改良SRK-T公式在散光人工晶状体度数计算中的应用价值.方法 回顾性系列病例研究.分析2007年10月至2008年6月行超声乳化白内障摘除联合球面人工晶状体植入术且资料完整的白内障病例68例(106眼).比较改良SRK-T公式与SRK-T公式计算得出的术后预测等效屈光度数之间的差异.矢量分析改良SRK-T公式预测的术后散光度与实际术后散光度之间的差异,并采用多元线性回归分析其影响因素.结果 改良SRK-T公式与SRK-T公式计算得出的术后预测等效屈光度结果完全吻合.矢量分析术后散光预测误差结果示:J0预测误差的因素主要是角膜散光(KS),J0=-0.108-0.102×KS(P=0.034).J45预测误差的因素主要是眼轴(L)与角膜平均屈光度(K),J45=1.797-0.019×L-0.031×K(P=0.009).结论 改良SRK-T公式的方法可以用于散光人工晶状体植入度数的计算,其误差跟角膜散光、眼轴、角膜平均屈光度有关. 展开更多
关键词 晶体.人工 度数计算 散光 矢量分析
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Comparison of the effects of two types of intraocular lens 被引量:2
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作者 陈伟蓉 刘奕志 +2 位作者 王宁利 郭彦 何明光 《Chinese Medical Journal》 SCIE CAS CSCD 2001年第12期54-57,106,共5页
Objective To evaluate the effectiveness and safety of implantation of flexible open-loop anterior chamber intraocular lens (FOAC-IOLs) and scleral fixated posterior chamber intraocular lens (PC-IOLs).Methods Sixty-eig... Objective To evaluate the effectiveness and safety of implantation of flexible open-loop anterior chamber intraocular lens (FOAC-IOLs) and scleral fixated posterior chamber intraocular lens (PC-IOLs).Methods Sixty-eight eyes of 68 patients with implanted intraocular lenses in the absence of posterior capsular support were reviewed retrospectively. According to the type of intraocular lens, patients were classified into two groups. In groupⅠ (30 eyes), FOAC-IOLs was implanted primarily or secondarily. In group Ⅱ (38 eyes), scleral fixated PC-IOLs was implanted primarily or secondarily. By gonioscopy and ultrasound biomicroscopy (UBM), accurate positions of IOLs' haptics and the relationship between the haptics and surrounding tissues were observed postoperatively and used to evaluate the influence of the two types of IOLs on ocular anterior segments. Follow-up was 6 to 20 months. Results Best corrected visual acuity of 20/40 or better was achieved in 27 eyes (90.0%) in group Ⅰ, and 35 eyes (92.1%) in group Ⅱ and the difference was not statistically significant (P>0.05). In group Ⅰ, 23 eyes (76.7%) had a total of 40 complications, while 13 eyes (34.2%) had 19 complications in group Ⅱ (P<0.05). Gonioscopy and ultrasound biomicroscopy showed that in group Ⅰ, all haptics of IOLs contacted with the iris completely and compressed the iris to different degrees, sometimes causing the anterior chamber angles to widen. Anterior synechia of the iris was caused by the haptics of FOAC-IOLs in 12 eyes. Among the 60 IOLs haptics, 39 foot plates of the haptics were properly fixed at the ciliary band; 21 haptics (12 eyes) penetrated through the iris into the stroma of the ciliary body with accompanying recurrent uveitis. In group Ⅱ, among the 76 IOLs haptics, 52 were adequately fixed in the ciliary sulcus regions, and 8 (8 eyes) were placed below the iris, causing goniosynechia. This type of angle closure was localized, with an open angle on each side of the haptics. The remaining 16 haptics were fixed onto the ciliary crown.Conclusions The current sutured mode of scleral fixated PC-IOLs can not ensure that IOLs haptics are placed in the ciliary sulcus. The haptics of FOAC-IOLs compress the iris and may penetrate through the iris into the stroma of the ciliary body. This can cause peripheral iris anterior synechia and chronic recurrent uveitis. The implantation of scleral fixated PC-IOLs is safer and shows better effects than that of FOAC-IOLs. 展开更多
关键词 intraocular lens · anterior chamber · transscleral fixation · ultrasound biomicroscopy
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